There are a couple dual-battery models out there, but they never seem to be cost effective. They're $250-$300 and the Superbrains are about $100 each.
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Originally Posted by eq1
I read you can buy an adapter and be able to charge 2 packs of the same design - at the same time. Yet, it sounded like this feature was only for particular types or brands of batteries; there was a specification, but I didn't know what it meant. Do you know anything about that?
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